Lead-dressing tool



Oct. 11, 1960 B. J. BOSWELL ETAL 2,955,769

LEAD-DRESSING TOOL Filed Oct. 8, 1958 //VV/V70/?$' B.J. Boswa L J. W l INSLA-Y. JR. a. c.

U ited States PatentO Ce LEAD-DRESSING rooL Billings I. Boswell, Naperville, and 'lohn'we .Ilinsleyiiln,

Downers Grove, 111., assignors to, Western Electric Company, Incorporated, NevvYpr-k, N.Y., a corporation of New York This invention relates to lead-dressing tools, and more particularly to devices for applying leads to terminals and for moving portions of the leads away from the P01! tions thereof attached to the terminals and to which solder is to be applied.

An object of the invention is to provide new and improved lead-dressing tools.

Another object of the invention is to provide a device for winding a bared end of an insulated lead onto a terminal and for moving the insulated portion of the lead away from the portion wound onto the terminal to protect the insulated portion from damage when the lead is soldered to the terminal.

A further object of the invention is to provide a sleeve having a notch therein which may he slid over a terminal having a bared end portion of an insulated lead wire wound onto the free end of the terminal to move the insulated portion along the terminal and to partially form the insulated portion aroud the terminal so that it will stay in a position removed fromthe bared end of the lead wire.

An apparatus illustrating certain features of the invention may include a sleeve having a notch therein for receiving an insulated portion of a lead, and which may be telescoped over a terminal to move the insulated portion of the lead to a position extending along the terminal and directed away from the bared end thereof wound around the terminal and for turning the lead as it is so moved to partially wrap the lead around the terminal. The sleeve may be mounted on a gun for winding the lead onto the terminal and means may be provided for actuating the sleeve to dress the lead after it has been applied to the terminal.

Other objects and advantages of the invention will become apparent by reference to the following detailed description thereof and the attached drawings illustrating a preferred embodiment of the invention in which,

Fig. 1 is an elevational partial sectional view of a device forming one embodiment of the invention and showing the device applying a lead to a terminal;

Fig. 2 is an enlarged vertical section taken along line 2--2 of Fig. 1;

Fig. 3 is a fragmentary side elevational view of an article with which the tool shown in Fig. l is used; and

Fig. 4 is a fragmentary top plan view of the article shown in Fig. 3.

Referring now in detail to the drawings, there is shown in Fig. l a lead applying and dressing device comprising a wrapping tool for winding a bared end portion 1 1 of an insulated lead or conductor 12 onto a terminal 14 adjacent the free end thereof, and a lead-dressing sleeve 20 for moving the insulated portion 15 of the lead 12 along the terminal and partially around the terminal to hold the insulated portion of the lead 12 away from the end of the terminal 14 so that when leads 12 have been applied to a plurality of closely positioned terminals 14 on an article 16 as shown in Fig. 3, the insulated portions of the leads are spaced and directed away from the tips of the terminals 14 and are not damaged by heat when solder is applied to the wound portions 11 of the lead 12. i v

The wrapping tool 10 may be similar to those disclosedand claimed in R. E. Bennett Patent No. 2,635,- 819,-isued AprilZl, 1953, for Apparatus for Wrapping Strands on Terminals, andL. E. Haagensen Patent No. 2,688,449, issuedSeptember 7, 1 954, for Wire Winding Tools}? and includes a stationary barrel 21 having a notch 22 ther ein; f or receiving and holding a lead 12. Rotatably mounted in the barrel 21 is a spindle 23 having an axial recess 24 for receiving the end of a terminal 14 therein and having a longitudinally extending groove or bore 25 in eccentric relation to theaxis of the spindle for receiving the bared end of the lead 12.

The lead-dressing sleeve 20 is slidably mounted on the barrel 21 of the wrapping tool 10 for axial and rotary movements and is adapted to be moved from a normal retracted or inoperative position shown in full lines in Fig. l .to an advanced or operative position shown in dotted lines. A radially disposed notch 30 in the leading edgeof the sleeve 20 is adapted to receive the lead 12 therein and impart turning movement thereto to wind the lead partially around the terminal as itis being moved axially thereof. This rotary movement of the sleeve is effected by a pin 34 on the barrel 21 extending into a slot 36 in the sleeve 20, the slot having a straight portion 37 permitting the sleeve 20 to be moved into engagement with the lead and having a curved portion 38 for imparting rotary movement to the sleeve and the lead 12 after the sleeve engages the lead.

The sleeve 20 is moved longitudinally by means of a push rod 40 which is guided for longitudinal movement in a pair of mounting brackets 42 on the housing of the wrapping tool 10 and which has a yoke 44 secured to its forward end. The yoke 44 ha a pair of pins 46 extending into an annular groove 48 in the sleeve for effecting a connection thereto. At its other end the rod 40 is connected to one end of a lever 50 pivotally mounted intermediate its ends at 51 on the wrapping tool ll) and having a handle 52 by means of which the operator may actuate the dressing sleeve 20 to its operative position. A spring 54 returns the push rod 40 and the dress-,

ing sleeve 20 to the normal inoperative position.

In the operation of the device, the bared end 11 of the lead 12 is inserted in the groove 25 of the spindle '23 of the wrapping tool, the lead 12 positioned in the notch 22 of the barrel 21, the wrapping tool applied to the end of the terminal 14 and actuated to wind the end 11 around the terminal, and on completion of the leadw-inding operation the operator actuates the lever 52 to move the dressing sleeve 20 longitudinally along the barrel into engagement with the lead 12 and cause the lead to seat in the groove 30 therein, and then to wrap a portion of the lead 12 partially around the terminal 14 as the lead 12 is moved away from the end 11 into close proximity or engagement with the mounting plate or article 16 on which the terminals are mounted.

It will be seen from Figs. 3 and 4 that the leads applied in this manner extend along the terminal and away from the wound end of the leads and are partially bent around the terminal adjacent the article 16 and are maintained thereby in spaced relation to the wound ends of the leads so that when the wound portions 11 of the leads are soldered to the terminals 14, the insulated portions of the leads will not be damaged thereby.

It is to be understood that the above-described arrangement is simply illustrative of the application of this invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is: a

' assages l'. A lead-applying device, which comprises a :wrapping tool for'winding an end'portion of alead wire around end of a terminal and having a stationary external ba re s a res n eev m un ed n the rel of the toolfor'movement betvveena retractedposit-ionwholly' on the barrel of the tool and an operative position ex- I ten ing 12' substantial distanee beyond the barrel, resilient means on the tool for moving the sleeve tolandyieldabl? 1 holding it in its retractedposition, and n ianually 'operable means on :said tool-tor moving'lthesleeve from 7 its retracted position to its operative 2. A lead-applying'device compnsm a-wrappmg- 'to ol for winding an end portion of a lead vvire around an end of a terminalsand having a gstationaryexternal barrel;

l a'dressing sleeveniounted on the barrel -for axialand rotary movements between 'aretraeted position whollyv on the :barrel' of thejtool ,and an operative position exon said toolvfor moving the sleeve axially from retr'aeted position to its operative position, and means for turning the sleeve on the barrel in response to movement of the sleeve to its operative position.

3. A device f or applying'lead wires to terminals, which comprises a Wrapping tool having a stationary external barreIIand means within said-barrel for engaging an end of a terminal and winding'an 'end portion of the lead stending a substantiahdistance beyond'the barrel, means wire onto the end of the terminal, a sleeve having a wirereceiving-notch in an end-thereof-mounted or axial rotary movement on the barrel, said barrel and said sleeve 7 being provided with a pin and slot connection for imparting rotary movement to the sleeve as the sleeve is i moved axially along the barrel; and manually operable means for moving the sleeve'along the barrel.

,and said sleeve being provided with a pin and slot'eonnection for imparting rotary movement to the sleeve as the sleeve is moved axially along the barrel, a push rod' mounted on the wrapping tool for movement parallel to the barrel, a yoke on said =rod having pins extending into' the peripheral groove in "the sleeve, and manually operable meansfor'movingthe push rod.

. 7 References Cited in the file ofthis patent Q UNITED STATES ,PATEN s 2,457,475 Johnson l osens; 194s 'V2,546,V489 -Wright Mar.27, 1951 

